Topic: Radio Speaker Grill (rear)

[5F09CNot4Sale]

For those that had a Reverb or the rear speaker (6x9) option. I am seeing two diffrent grills (again both 6x9). I believe though looking at Rotunda catalog pictures (I have a 65 rotunda catalog) that the 64-65 style would be the rectangle opening (right). Yet I have one and have been seeing a rash of the roundish ones on Ebay as of late. (left) The base is the same. Anyone know what year would be the change over? I believe the roundish holes had a C7 number on ebay so arround 67 but anyone know more then my guess?